As more antibiotics were discovered, designed and studied and found that they had different properties. Some of these
properties include their source, range of activity and their kinds. These were used to classify them into different categories such as ß lactam, tetracycline, rifamycins, aminoglycoside-aminocyclitol antibiotics, macrolide, polypeptide antibiotics, glycopeptide antibiotics etc. (Russell, 2004).